Safety-lock.



A. ZOLA.

SAFETY LOCK.

AIPLIOATION FILED 00T. 29, 1910.

1,01 1,703. Patented 1)@0.12,1911.l

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ANDREWl ZOLA, OF PITTSBURGH, PENNSYLVANIA.

SAFETY-LOCK. i

Specification of Letters Patent.

Application led October 29, 1910.

Serial No. 589,736.

To all whom it may concern:

Be it known that I, ANDREW ZOLA, a citizen of the United States, residing at Pittsburgh, in the State of Pennsylvania, have invented certain new and useful Improvements in Safety-Locks, of which the following is a specilication.

My invention relates to secret locks or permutation locks, and its primary object is to provide a secret locking mechanism which is diiiicult to open, without depending upon complicated keys and tumblers, or combinations of dials, such as in the usual combination locks.

In the accompanying drawing Figure 1 is a top plan view of the lock with the cover taken oii". Fig. 2 is a cross-section along the line (2) of Fig. 1, and Fig. 3 is a crosssection along the line of Fig. 1. Fig. 4 is a side elevation of the lock, showing the key-hole guard open.-

Generally in making locks which are diflicult to open, the complicated form of the key and co-acting tumblers has been depended upon. I avoid this by arranging the lock to open only after certain predispositions of parts, known only to the owner of the lock, have been manually made.

As shown in the accompanying drawing, I mount upon the base 5, which is provided with an opening 6 to receive a hasp, a sliding bolt 7, which is provided with guards 7a and 7b and on the under side slides over a holding plate 8, pivoted to the base 10a at 9 and having a tongue 10 engaging slots in the bolt 7, to hold it in posit-ion, in the usual manner. On top of the bolt 7, and moving with it, is pivoted a tumbler plate 11 having a finger 12 by which the key is engaged, in order to push the bolt backward to the right. This plate 11 with the finger 12 is normally in the withdrawn position as shown in Fig. 1 and held back by pin 13 on the -spring guard bar 14, against the pressure of the spring 15. That is, with the parts in the position shown in Fig. 1, the key K may be turned without engaging the nger 12 or moving the bolt,-so that the lock cannot be opened. The tumbler linger 12, however, may be released so as to stand in the path of the key by forcibly lifting the bar 14 carrying the stud 13 with it, whereupon the spring 15 depresses the tumbler 11 and finger 12 to the position shown in dotted lines, where it can be engaged by the key and the bolt thrust back. The tumbler 11 is pivoted to bolt 7 at 9 and move together. The lift-ing ofthe bar 14, to release the tumbler, is eii'ected by pushing on the pin 15, attached to the free end of the bar and projecting through the outside of the lock as shown in Fig. 4. Said pin is inside the guard casing 16 which covers the pins, and of course is inaccessible when the lid 17 of the box is closed. It will be noted from Fig. 1, however, that the pin 15 and the bar 14 cannot be pushed inward until the catch bar 18 is moved out of its engagement with notch on the pin 15. This bar 18 is pivoted at 19 to the base plate 5, and its movement is effected by pushing the button 20 on the outside of the lock. Normally the lid 17 of the key-hole boX 16 is closed as shown in Fig. 3, the pin 21 thereon being notched and also engaged by the bar 18, which is normally held in position by a spring 22. -It will be evident therefore that in order to unlock the device, the operator must rst slide the button 20 which is made to appear exactly like the attaching screws S S, so that moving t-he bar 18 this latter disengages the pin 21 and the lid 17 flies open under the influence of the spring 23. The key may thereupon be inserted on the key stud 24; but it will be noted it can as yet have no engagement with the locking bolt 7 through the finger 12 of plate 11. The operator must again slide the but-ton 2O backward with one hand and depress the pin 15 with the other, in order to raise the bar 14 and release the hold of the pin 13 on the catch finger 12a of the tumbler plate 11, to let it come :torward. When this is done, the linger 12 stands in the way of the key and the bolt can be slid back and the lock opened. (The pin 15a is like 15, and used only for a blind, as is also the outside key-hole 17 a).

In locking the device, all that is necessary is to turn the key twice, the first turn striking the shoulder 25 of the bolt 7 and the second turn striking the finger 12 and pushing the plate 11 back against the spring 15 until the pin 13 is raised and again engages on the front side of the catch finger 12a. The lock as described, is not dependent upon the form of the key. For this reason the lock can not be opened by substitute keys, as locks are usually picked, nor can it be opened with the correct key without a knowledge of the necessary manipulation. It is therefore reasonably safe from interference by unauthorized persons and at the Patented Dec. 12, 1911.

and secret means for placing the operating means in reach of the key, said means including two releasing devices and an operating element outside the lock adapted to actuate both said releasing devices.

2. A lock comprising a bolt, a tumbler normally out of reach of the key ot the lock and a spring catch holding it in such position, a pin on the catch, normally pressed outwardly thereby and projecting through the outside of the lock and having connected devices to put the tumbler in operating position, a latch retaining said pin and a slidable button on the outside ot' the lock adapted to move the latch, whereby the tumbler. can only be released by simultaneous manipulation of both the button and the pin.

3. A lock comprising a bolt, a tumbler normally out of reach of the key of the lock and a catch holding it in such position, a pin projecting through the outside of the lock and having connected devices to put the tumbler in operating position, a latch retaining said pin and secret means outside the lock to release the latch, a key-hole guard and secret means to release it.

4. In a lock the combination of a closed casing having a key-hole With a closed guard, secret means to open the guard, a bolt With an actuating device normally out o' reach of the key ot the lock, duplicate means including the key-hole guard opening device, 'for placing the bolt in condition to be actuated by the key, substantially as described.

In testimony whereof I have hereunto signed my name in the presence of the tivo subscribed Witnesses.

ANDRE'W ZOLA.

Witnesses Amir MARCINKIEWICZ, JAN W. YsorAL.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

